Double-deck backpack



FIG. 1 is a perspective view of a double-deck backpack design showing my new design.

FIG. 2 is a front view of the double-deck backpack.

FIG. 3 is a rear view of the double-deck backpack.

FIG. 4 is a left side view of the double-deck backpack.

FIG. 5 is a right side view of the double-deck backpack.

FIG. 6 is a top view of the double-deck backpack; and,

FIG. 7 is a bottom view of the double-deck backpack.

Any shading is not a feature of the design but is utilized to illustrate the surface contours of the double-deck backpack design in the drawings.

The broken lines in the figures depict stitching that forms no part of the claim. 

CLAIM The ornamental design for a double-deck backpack, as shown and described. 